FINGERPRINTING

Question 1

What does finger print analysis relies on?

Answer 1

comparisons to make desicsions
based on similarities

Question 2

random match probabilities

Answer 2

can offer a more realistic
and accurate understanding of the value of the evidence

Question 3

A Means of Identification

Answer 3

the oldest forms
of identification

locate, identify, and eliminate suspects
identify human remains

the use of fridge ridge skin on the
palmar and plantar surfaces

Question 4

What are the two traits that greatly maximize the value of this type

Answer 4

each fingerprint is highly unique
fingerprints essential remain the same

Question 5

When do fingerprints being to develop

Answer 5

fingerprints begin to develop during the
10th-16th week of gestation

Question 6

Edpidermis layer and dermis layer anatomy

Answer 6

epidermis layer of our skin, but is
formed in the dermis layer

Question 7

Trauma in epidermis/ dermis layer

Answer 7

traumas to the
epidermis layer, the details are
unaffected

trauma to the dermis
layer may result in noticiable and
irreversible changes to the details

Question 8

Fingerprint Patterns
percentage
loop, whorl, arch

Answer 8

Whorl Arch
~60-65%
of the population
~30-35%
of the population
~5%
of the population

Question 9

Loop

Answer 9

Loop Ridges flow in and out the same side

one delta

Question 10

Whorl

Answer 10

Ridges flow in a circular pattern two deltas

Question 11

Arch

Answer 11

ridges flow in and out on opposide sides
no delta

Question 12

The Bertillon System

Answer 12

general descriptions and photographs

applied anthropometric measurements

mostly cranial measurements and cranial capacity

estimates
designed to identify individual criminals by physical
characteristics

a total of 11 measurements were used

Answer 13

frontal and profile facial photographs

five primary measurements
head length
head breadth
length of middle finger
length of left foot
length of “cubit” (forearm from elbow to middle
fingertip)

physical appearance descriptions
weight, build, eye color, teeth, nose, etc.

Question 14

Henry Classification System

Answer 14

Sir Edward Henry developed this system
classification is based on all 10 prints

each finger is assigned a value

the observation of a whorl = 0

expressed as a fraction

Question 15

AFIS

Answer 15

Automated Fingerprint Identification
System

a computer storage and retrieval
system

capable of searching for the
presence of 10-print card or a
single print

used to compare unknown against
known, unknown against unknown

Question 16

Three categories of prints

Answer 16

Latent Patent Plastic
requires additional
processing to be visible
visible,

Patent not in need of
development techniques

Plastic indentation of ridge
detail in/on a surface

Question 17

What are processing techniques

Answer 17

Powder
powders are dusted onto a nonporous surface

adheres to the moisture content of
the latent print

come in various colors as well as
magnetic

Chemical
depending on the chemical, can be
used for both porous & non-porous
surfaces

some will adhere to moisture
content while others adhere to
amino acids

potential for use on both wet and
dry surfaces

Question 18

ACEV

Answer 18

A: Analysis
C: Comparison
E: evaluation
V: verification

methodology used to classify fingerprint patterns